Made the bookmarks extension APIs aware of managed bookmarks.

chrome/browser/extensions/api/bookmarks/bookmarks_api.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CHROME_BROWSER_EXTENSIONS_API_BOOKMARKS_BOOKMARKS_API_H_
 #define CHROME_BROWSER_EXTENSIONS_API_BOOKMARKS_BOOKMARKS_API_H_
 
 #include <list>
 #include <string>
 #include <vector>
@@ skipping 128 matching lines @@
   // can't be created based on the given details, sets error_ and returns NULL.
   const BookmarkNode* CreateBookmarkNode(
       BookmarkModel* model,
       const api::bookmarks::CreateDetails& details,
       const BookmarkNode::MetaInfoMap* meta_info);
 
   // Helper that checks if bookmark editing is enabled. If it's not, this sets
   // error_ to the appropriate error string.
   bool EditBookmarksEnabled();
 
+  // Helper that checks if |node| can be modified. Returns false if |node|
+  // is NULL, or a managed node, or the root node. In these cases the node
+  // can't be edited, can't have new child nodes appended, and its direct
+  // children can't be moved or reordered.

[not at google - send to devlin, 2014/06/03 18:09:16]

I'm a little confused by this comment. Why does, for example, |node| being a
root node prevent it from having a new child appended?

[Joao da Silva, 2014/06/05 17:10:32]

Note that there is _the_ root node, and there are the permanent "root" nodes,
which are the direct children of the root node. You can add nodes to the
permanent nodes (bookmark_bar, other_node, etc) but not to the root_node.

+  bool CanBeModified(const BookmarkNode* node);
+
  private:
   // BaseBookmarkModelObserver:
   virtual void BookmarkModelChanged() OVERRIDE;
   virtual void BookmarkModelLoaded(BookmarkModel* model,
                                    bool ids_reassigned) OVERRIDE;
 };
 
 class BookmarksGetFunction : public BookmarksFunction {
  public:
   DECLARE_EXTENSION_FUNCTION("bookmarks.get", BOOKMARKS_GET)
@@ skipping 195 matching lines @@
  private:
   virtual ~BookmarksExportFunction() {}
 
   // BookmarksFunction:
   virtual bool RunOnReady() OVERRIDE;
 };
 
 }  // namespace extensions
 
 #endif  // CHROME_BROWSER_EXTENSIONS_API_BOOKMARKS_BOOKMARKS_API_H_